To assist her daughter in a dress fitting, Endora transforms herself into a double of Samantha. While at the fitting, Robert Frazer, a young writer, becomes smitten with her. Endora decides to cavort with him as Samantha. Meanwhile, Gladys Kravitz thinks Samantha is having a secret affair. There are further complications when it turns out that Bob is an old friend of Darrin's. Endora shows up as Samantha at a dinner that Darrin, Sam and Bob are having. Bob now believes Endora is Sam's twin.

Flirtatious neighbour Pleasure O'Riley moves in next door to the Stephens. Samantha doesn't really appreciate Pleasure's ignorantly blissful helpless girl demeanour, or Darrin's seeming fawning over her at her beck and call because of it. Her incredibly jealous boyfriend, 'Thunderbolt' Swenson, mistakenly suspects both Darrin and Abner Kravitz of impropriety.

Samantha volunteers to work on the election campaign of Ed Wright, who is running for Morning Glory Circle councillor against long time incumbent John C. Cavanaugh. Wright wants to expose Cavanaugh's immoral and illegal dealings in past capital works projects. With Endora's help, that is what happens.